Transactions of Materials and Heat Treatment

Title：Study on densification behavior of sintered powder pure aluminum during equal channel angular extrusion process

Authors： ZHOU Ming-zhi LI Ping XUE Ke-min

Unit： China Electronic Technology Group Corporation No.38 Institute Hefei University of Technology

KeyWords： porous material equal channel angular extrusion densification behavior

ClassificationCode：TG376

year,vol(issue):pagenumber：2010,35(3):135-138

Abstract：

ECAE experiment was carried out for the sintered powder pure aluminum. Experimental results show that the ECAE process has powerful densification effect and the microstructure has obvious shear deformation character after the single pass extrusion; during the multiple processes, the densification effects and the microstructure of material vary with different routines. Analysis shows that in the single ECAE process the closing effect of pore depends on shear deformation character and stress state of material, which is the key factors to obtain high density under large shear plastic deformation and high hydrostatic stress state. According to the strain value accumulation and different shear deformation characters, multiple passes can rearrange the powder particle, change pores shape and make the powder material get higher density.

Funds：

国家自然科学基金资助项目（50875072）

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